Victorian House - New bath, New shower or complete remodel

Guy1960

I have a Victorian terraced house with bathroom done about 30 years ago and is rented out

There is a leak under bath  causing some intermittent dampness to ceiling below  

I have been quoted £1445 plus VAT which includes new bath and panel, new shower screen and fittings and attention to floor boards/vinyl flooring

Quoted £3500 plus VAT for replacement of bath with shower and base 

Both quotes through landlords agents look rather steep to me .  can someone give an idea of what I should be expecting to pay

Also can anyone recommend any reputable bathroom people in Southend Area for possible remodelling of whole bathroom ?

Looking for a bit of help

Pics attached

Any assistance gratefully received